JPH0710995U - Printed circuit board insertion / extraction lever - Google Patents

Abstract

(57) [Abstract] [Purpose] Regarding the structure of the insertion / extraction lever in the attachment / detachment mechanism of the printed circuit board, when inserting and mounting the printed circuit board in the box-shaped housing, the reliability of the insertion work is added to eliminate work mistakes. Try to improve the reliability of the product. [Structure] An engaging portion 5e that engages with an open end portion 2a of a box-shaped housing 2 that houses a printed circuit board 1, and a hand operation portion 5d that applies an operating force when the printed circuit board is inserted and removed. An insertion / removal lever of the printed circuit board 1 pivotally attached to a rotation pin 5b provided upright on the rear end side of the printed circuit board 1, wherein a fitting hole 5c of the insertion / removal lever is loosely fitted to the rotation pin 5d. The connector 3 at the tip of the printed circuit board 1 and the connector 4 of the box-shaped housing are made rotatable and when the engaging portion 5e is brought into contact with the outer surface of the opening end 2a of the box-shaped housing. That is, the stopper surface 8 is provided so as to have a gap between and.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of an insertion / extraction lever in a mechanism for attaching and detaching a printed circuit board.

[0002]

[Prior art]

 In the attachment / detachment mechanism of the printed board that is attached to electronic devices such as personal computers and various control devices, in order to perform the attachment / detachment method securely and smoothly, the rotating board provided at the end of the printed board is used. An insertion / extraction lever is provided.

That is, as shown in FIGS. 5 to 7, turning pins 5b and 5b are provided on one surface of the rear end portion of the printed circuit board 1, and each turning pin 5b has a fitting hole 5c for inserting and removing lever 5. Is rotatably fitted.

The insertion / removal lever 5 is rotated around the rotation pin 5b by the hand operation unit 5d, and the printed circuit board 1 is mounted on the opposite side of the hand operation unit 5d with the fitting hole 5c interposed therebetween. The engaging portion 5e is provided in a protruding jaw shape.

The package connector 3 of the printed circuit board 1 is fitted to the backboard connector 4 of the box-shaped housing 2 by the engaging portion 5e of the insertion / removal lever 5. That is, as shown in FIG. 5, the printed circuit board 1 is inserted into each storage part of the box-shaped housing 2, and as shown in FIG. 6, the upper and lower insertion / extraction levers 5 at the rear end of the printed circuit board 1 are at hand. The operation portion 5d is manually rotated in the direction of the arrow to engage the engagement portion 5e with the inner surface of the opening end portion 2a of the box-shaped housing 2.

Then, the contact portion between the inner surface of the opening end 2 a and the engaging portion 5 e is used as a reaction force, and the engaging hole 5 c of the insertion / extraction lever 5 is inserted into the back of the box-shaped housing 2 by the rotation of the engaging portion 5 e. To the rear side (indicated by an arrow in the figure), so that the printed circuit board 1 also moves to the inner side of the box-shaped housing 2 via the rotating pin 5b.

In this way, the package connector 3 provided on the front end of the printed board 1 and the backboard connector 4 provided on the box-shaped housing 2 are electrically connected at corresponding positions. At the same time, the insertion / removal lever 5 engages with the lock lever 6 provided on the same side of the printed circuit board 1 to be in a locked state. The printed substrate 1 thus mounted cannot be taken out from the box-shaped casing 2, and the desired state is achieved.

[0008]

[Problems to be solved by the device]

 However, since the insertion / removal lever 5 is rotatable in a state where the rotation pin 5b and the fitting hole 5c are fitted with each other with a slight frictional force, the hand operation section 5d as shown in FIG. It may be stationary horizontally.

In this state, when the worker pushes the printed circuit board 1 in a direction indicated by an arrow in the drawing with great force, the printed circuit board 1 is forcibly inserted into the storage portion of the box-shaped housing 2, and the package connector 3 and the back board are inserted. There is a problem that the connector 4 collides and the connector part is scratched or damaged.

[0010] Therefore, if the connector part is scratched, rust will be generated from it, which will eventually hinder the electrical connection. If it is damaged, a new printed circuit board must be replaced, and the product reliability will be reduced. It is inferior and causes a rise in costs.

The present invention has been made in view of the above problems, and when the printed circuit board is inserted and mounted in the box-shaped casing, the reliability of the insertion work is added to eliminate mistakes in the product. It is an object to provide a printed circuit board insertion / extraction lever that improves reliability.

[0012]

Means for Solving the Problems The object of the present invention to solve the above problems and achieve the above objects is to provide an engaging portion that engages with an open end of a box-shaped housing that houses a printed circuit board, and a print. An insertion / extraction lever for a printed circuit board that is pivotally mounted on a pivot pin that is erected on the rear end side of the printed circuit board and that has a hand operation unit that applies operating force when the board is inserted and removed. The fitting hole of the lever is loosely fitted to the rotation pin to be freely rotatable, and the tip of the printed circuit board when the engagement portion is brought into contact with the outer surface of the opening end of the box-shaped housing. That is, a stopper is provided so as to have a gap between the connector of the part and the connector of the box-shaped housing.

[0013]

[Action]

 According to the insertion / extraction lever of the printed circuit board of the present invention, the insertion / extraction lever is freely rotated by its own weight because it is loosely fitted to the rotation pin of the printed circuit board. Therefore, in the state shown in FIG. 5, the operation part of the insertion / extraction lever arranged above the rear end of the printed circuit board does not maintain the horizontal state but rotates downward, and the entire insertion / extraction lever is in the vertical state. And is pivotally supported by the turning pin. In this way, the stopper of the insertion / extraction lever is held against the outer surface of the opening end of the box-shaped housing, and the printed board is inserted only inside the storage section of the box-shaped housing. The insertion operation is stopped by the contact. At this time, since a predetermined gap is maintained between the package connector of the printed circuit board and the backboard connector of the box-shaped housing, no scratches or damage due to impact when the printed circuit board is inserted incorrectly. .

[0014]

【Example】

 Next, an embodiment of the present invention will be described in detail with reference to the drawings. 1 and 2 are explanatory views showing a use state of the insertion / removal lever of the present invention, and FIGS. 3 to 4 are a front view and a side view of the insertion / removal lever. In the figure, reference numeral 7 indicates an insertion / extraction lever according to the present invention, and 8 indicates a stopper. The parts corresponding to the conventional example are given the same reference numerals.

The insertion / removal lever 7 is provided with a fitting hole 5 c so as to be in a loosely fitted state with a diameter slightly larger than the diameter of the rotating pin 5 b of the printed board 1, and the opening end of the box-shaped housing 2 is provided. As shown in FIG. 3, the engaging portion 5e that engages with the inner surface of the portion 2a is provided with a stopper 8 which is a smooth wall surface at a predetermined distance a from the fitting hole 5c.

As shown in FIG. 1, the stopper 8 is fitted with the turning pin 5b of the printed circuit board 1 and the fitting hole 5c, and when the insertion / removal lever 7 is freely turned into a vertical state. It is provided so as to be held substantially parallel to the outer surface of the opening end 2a.

As shown in FIG. 2, the distance a from the fitting hole 5c is provided at the tip of the printed circuit board 1 when the stopper 8 is brought into contact with the outer surface of the opening end 2a. In addition, a gap s is set between the end surface of the package connector 3 and the end surface of the backboard connector 4 of the box-shaped housing 2. How much the gap s should be is a matter of design.

FIG. 1 shows that the insertion / extraction lever 7 thus formed is provided at the rear end of the printed circuit board 1 at least on the upper side and is used by a worker. The printed circuit board 1 is inserted into the storage part of the box-shaped housing 2 while gripping the operation part 5d, and the insertion / extraction lever 7 is rotated to engage the engagement part 5e with the inner surface of the opening end 2a to store the printed circuit board 1 in the storage part. The package connector 3 and the backboard connector 4 are electrically connected to each other by strongly pushing them inward.

On the other hand, when the operator does not grip the insertion / ejection lever 5d and pushes the end surface of the printed circuit board 1 vigorously as indicated by the arrow in FIG. 1, the insertion / ejection lever 7 is self-weighted as shown in FIG. The stopper 8 is rotated to be in a vertical state, and the stopper 8 holds the outer surface of the opening end 2a substantially in parallel with each other. Before the end surface of the package connector 3 and the end surface of the backboard connector 4 collide with each other, the stopper 8 is provided therebetween. The stopper 8 and the outer surface of the opening end 2a are in contact with each other with a gap s.

In this way, even if an operator inserts the printed circuit board 1 by mistake, the stopper 8 of the insertion / extraction lever 7 according to the present invention prevents the connectors 3 and 4 from being scratched or damaged. Is done. Since the operator cannot connect the connectors 3 and 4 by merely pushing the printed circuit board 1, the insertion / removal lever 7 must be manually rotated to move the printed circuit board 1 into the box-shaped housing 2. It comes to be installed in the storage part. In this way, the electrical connection of the connectors 3 and 4 becomes reliable.

As described above, the stopper 8 of the insertion / removal lever 7 is a smooth wall surface that is substantially parallel to the outer surface of the opening end portion 2a. However, the present invention is not limited to this, and the engaging portion 5e to the outer surface of the opening end portion 2a are not limited to this. It may be a rod-shaped leg portion that protrudes toward the front by a predetermined length.

[0022]

[Effect of device]

 As described above, the insertion / extraction lever of the printed circuit board according to the present invention has an engaging portion that engages with the open end of the box-shaped housing that houses the printed circuit board and an operating force when the printed circuit board is inserted / removed. A lever for inserting and removing the printed circuit board, which is pivotally attached to a rotary pin that is erected on the rear end side of the printed circuit board and that has a fitting hole of the rotary pin. And the connector of the box-shaped casing and the connector of the tip of the printed circuit board when the engaging portion is brought into contact with the outer surface of the open end of the box-shaped casing. Since a stopper is provided so that there is a gap between the connector and the connector, damage to the connector is prevented and the electrical connection of the connector is ensured even if the connector is mistakenly operated during insertion of the printed circuit board. It has an excellent effect of improving reliability. .

[Brief description of drawings]

FIG. 1 is an explanatory view showing a usage state of an insertion / extraction lever of the present invention.

FIG. 2 is an explanatory view showing a use state of the insertion / extraction lever of the present invention.

FIG. 3 is a front view of an insertion / extraction lever according to the present invention.

FIG. 4 is a side view of the same.

FIG. 5 is an overall perspective view showing a mechanism for attaching / detaching a printed circuit board using an insertion / extraction lever according to a conventional example.

FIG. 6 is an explanatory view showing a state in which a printed circuit board is inserted using the insertion / extraction lever according to the conventional example.

FIG. 7 is an explanatory diagram showing a state in which the insertion / extraction lever according to the conventional example is rotated around a rotation pin, and the printed circuit board is inserted while being held in a horizontal state.

[Explanation of symbols]

 1 printed circuit board, 2 box type housing, 2a open end, 3 package connector, 4 backboard connector, 7 insertion / extraction lever according to the present invention, 8 stopper.

Claims (1)

[Scope of utility model registration request] 1. A printed circuit board having an engaging portion that engages with an open end of a box-shaped housing for accommodating the printed circuit board, and a hand operation section that applies an operating force when the printed circuit board is inserted and removed. An insertion / removal lever of a printed circuit board axially attached to a rotation pin erected on the rear end side, wherein a fitting hole of the insertion / removal lever is loosely fitted to the rotation pin to allow rotation. A stopper positioned at the engaging portion so as to have a gap between the connector at the tip of the printed circuit board and the connector of the box-shaped casing when brought into contact with the outer surface of the opening end of the box-shaped casing. The printed circuit board insertion / extraction lever is characterized by the provision of.